1.	Simplify 1 Simplify the following expression: $$ \left(2 - 6\right)\left(-1 - -6\right) - {\left(3 - 2\right)}^{2} $$ Correct Answer $$ -21$$ or -21.0000

2.	Simplify 2 Simplify the following expression: $$ {\left(2(-6)5\right)}^{\left(\frac{-6}{5} - 1\times1\right)} $$ Correct Answer $$ {(-60)}^{\frac{-11}{5}}$$ or NaN

3.	Fractions 1 Simplify the following expression: $$ \frac{5}{2} - \frac{2}{5} $$ Correct Answer $$ \frac{21}{10}$$ or 2.1

4.	Fractions 2 Simplify the following expression: $$ \frac{\frac{2}{6}}{\frac{1}{3}} $$ Correct Answer $$ 1$$ or 1.0

5.	Significant figures 1. Write the following to 5 significant figures: 2.8397859 Correct Answer 2.8398 or $$2.8398\times10^{0}$$ 2. Write the following to 4 significant figures: 848.40737 Correct Answer 848.4 or $$8.484\times10^{2}$$

6.	Standard Form 1. Write the following in standard form to 4 significant digits: 0.000210263 Correct Answer $$2.103\times10^{-4}$$ 2. Write the following in standard form to 4 significant digits: 0.284492 Correct Answer $$2.845\times10^{-1}$$

7.	Significant figures 1. Write the following in preferred standard form to 4 significant digits: 0.000574249 Correct Answer $$574.2\times10^{-6}$$ 2. Write the following in preferred standard form to 3 significant digits: 0.1748 Correct Answer $$175\times10^{-3}$$

8.	Simplify 2 Simplify the following expression: $$ \frac{2\times4}{-4(-5)}2(-6)1 $$ Correct Answer $$ \frac{-24}{5}$$ or -4.80000

9.	Simplify 1 Simplify the following expression: $$ 2\times2\times4\left(-5(-1) + -1 - 5\right) $$ Correct Answer $$ -16$$ or -16.0000

10.	Simplify 2 Simplify the following expression: $$ {\left(2 + 5\right)}^{2} - \frac{4 - -4}{-6 + -5} $$ Correct Answer $$ \frac{547}{11}$$ or 49.7273